| article html file updated | 7 February 2020 22:12 CET | Update | https://www.mdpi.com/2073-4395/7/1/9 |
| article html file updated | 23 September 2019 01:25 CEST | Update | N/A |
| article html file updated | 4 May 2019 13:39 CEST | Update | N/A |
| article html file updated | 27 March 2017 09:42 CEST | Update | N/A |
| article html file updated | 25 January 2017 08:29 CET | Original file | N/A |
| article xml uploaded. | 25 January 2017 08:27 CET | Update | https://www.mdpi.com/2073-4395/7/1/9/xml |
| article xml uploaded. | 25 January 2017 08:27 CET | Original file | N/A |
| article pdf uploaded. | 25 January 2017 08:27 CET | Version of Record | https://www.mdpi.com/2073-4395/7/1/9/pdf |
